Compound to solder aluminum



Patented Sept. 6, 1927.

UNITED STATES PATENT OFFICE.

GEORGE E. GAIL, OF DETROIT, MICHIQAN, ASSIGNOR OF ONE-HA LF '10 ALEXSEITZ, OF

. WAYNE COUNTY, MICHIGAN.

COMPOUND TO SOLDIER ALUMINUM.

No Drawing.

The present invention relates to a soldering compound, and moreparticularly an improved compound for use with aluminum, and a method ofmaking the same.

An object of the present invention is to provide'a solder, which may beused w th virgin aluminum, and a compound wh1ch may be used either withor without a soldering iron.

1 Another object of the invention is to provide acompound which may bemade on atwenty-five pounds of virgin solder, the

latter being the base of the improved compound.

First, approximately nine and one-quarter pounds of zinc are melted, andfor the purpose of closing the grain or pores of the zinc, the same ispoured into cold water effecting the quick chill of the molten metal,

and this treatment imparts to the block tin a greater capacity to alloywith zinc, and producesha finalcompound or solder which is of a veryfine grain. The zinc is then remelted and to it is added approximatelyfifteen and one-quarter pounds vof block tin, the block tin being addedvery slowl and the mass being continuously stirred uring such addition.About one-quarter of a pound of lead is then added very slowly to themass while being stirred, and approximately one-quarter pound ofphosphorous tin is added during the stirring, and the mass is kept inagitation for approximately fifteen minutes longer to effect a thoroughmixing and distribution of the tin and lead throughout the molten mass.

Application filed larch 12, 1928. Serial No. 94,325.

After the mass has been thoroughly stirred, a block of wood in the shapeof a two inch cube, or other suitable size and shape desired, isattached to a pole or rod and forced downwardly into the mass of metaland held at or near the bottom of the mass for approximately fifteenminutes. The block of wood in the molten metal is to produce tne boilingof the metal and to determine u. thorough admixture of the variousingredients, because the molten metal will not adhere to the blockofwood and the block of wood-will thus produce a scum at the top of themass which may be readily skimmed oil to remove the impurities. Afterthe impurities rising to the top of the boiling mass ave been removed,there is then added about one-quarter ounce of pure beeswax, whichserves as a flux as it readily works through the entire mass of metaland drives up to the surface all of the smaller particles of impuritiesthat turn green. The use of beeswax in the mixture is found to beimportant as other fluxes have failed to bring out these green coloredimpurities.

The metal is now ready to be oured off into an iron chill or mold whichs ould first be raised to a temperature of approximately 150 degrees.

It is found that this new solder may be used with virgin aluminum andthat the product may be handled'with or without a soldering iron.

What is claimed is 1. The method of compounding an aluminum solder whichconsists in first melting approximately nine and a quarter pounds ofzinc, pouring the molten mass of zinc into a chilling fluid to close thepores of the zinc, remelting the zinc, slowly adding theretoapproximately fifteen and a quarter pounds of block tin, then separatelyadding slowly approximately one quarter pound each of lead andphosphorous tin, stirring the mass to thoroughly intermix saidingredients, then immersing and maintaining near the bottom of themass'a block of wood to effect the boiling of the mas, and finallyadding approximately one quarter ounce of pure beeswax to the mass forseparating the impurities therefrom for removal at the surface of theboiling mass.

2. An aluminum solder comprising a compound of the following ingredientsin substantielly the proportions named: zine, nine and one quarterpounds; block tin, fifteen and one quarter pounds; lead and phosphor oustin, each one quarter pound; and pure. 10 beeswax, one quarter ounce;the compound being characterized by hoiling'and removal of impuritiestherefrom.

In testimony whereof I afl'lx my signature.

GEORGE E. GAIL.

